Table 2.
Patient Demographics by TBI Phenotype
| Phenotype A | Phenotype B | Phenotype C | p value | |
|---|---|---|---|---|
| Age (years)a | ||||
| Median (IQR) | 42 (29) | 35 (28) | 40 (31) | 0.116 |
| Subject Count (%) | ||||
| 18–30 | 144 (34%) | 184 (41%) | 124 (36%) | |
| >30–45 | 98 (23%) | 97 (22%) | 76 (22%) | |
| >45–60 | 124 (30%) | 118 (26%) | 101 (29%) | |
| >60 | 54 (13%) | 47 (11%) | 46 (13%) | |
| Genderb | ||||
| Male | 281 (67%) | 403 (90%) | 219 (63%) | p < 0.0001 |
| Female | 139 (33%) | 43 (10%) | 128 (37%) | |
| Raceb | ||||
| White | 347 (83%) | 369 (83%) | 282 (81%) | p = 0.863 |
| Black or African-American | 61 (14%) | 60 (13%) | 54 (16%) | |
| Another race | 12 (3%) | 17 (4%) | 11 (3%) | |
| Ethnicityb | p = 0.240 | |||
| Hispanic | 18 (4%) | 22 (5%) | 9 (3%) | |
| Non-Hispanic | 402 (96%) | 424 (95%) | 338 (97%) | |
| Educationb | ||||
| High school or less | 203 (48%) | 211 (47%) | 182 (52%) | p = 0.604 |
| Some college or trade school | 142 (34%) | 161 (36%) | 110 (32%) | |
| College graduate or more | 75 (18%) | 74 (17%) | 55 (16%) | |
The demographic distribution of patients in each phenotype. Number of subjects in each demographic group is listed under phenotype columns as well as the percentage of the total number of patients in that phenotype group. Superscripts denote statistical test used to compute p values displayed in Column 6.
a
Kruskal–Wallis test with Holm's correction for multiple comparisons used to compute p values, significance is p < 0.05.
b
Pearson's χ2 test used to compute p-values, significance is p < 0.05.
TBI, traumatic brain injury; IQR, interquartile range.